Read books, I don't think that you'd like video games too much from your avatar

. They're not too much better than TV, it prevents you from doing things that are more productive. TV is also an income suppressant.
If you look into The Evelynn Wood Speed Reading program you can significantly increase your reading speed and comprehension of material.
http://www.amazon.com/Remember-Every...eading+program
There is also spreeder.com which is great for practicing that (thanks for pointing this out Richard)
Other things
1. Stippling plastic for guns
2. Gunsmithing
3. Learn a new language, brush up on skills in current foreign language
4. Listen to audio programs (audible.com)
5. Learn to use photo software
6. Lots of dryfire practice
Hope that helps man